/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:59:42,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:59:42,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:59:42,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:59:42,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:59:42,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:59:42,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:59:42,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:59:42,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:59:42,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:59:42,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:59:42,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:59:42,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:59:42,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:59:42,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:59:42,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:59:42,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:59:42,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:59:42,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:59:42,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:59:42,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:59:42,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:59:42,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:59:42,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:59:42,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:59:42,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:59:42,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:59:42,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:59:42,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:59:42,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:59:42,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:59:42,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:59:42,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:59:42,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:59:42,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:59:42,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:59:42,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:59:42,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:59:42,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:59:42,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:59:42,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:59:42,569 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:59:42,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:59:42,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:59:42,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:59:42,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:59:42,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:59:42,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:59:42,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:59:42,572 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:59:42,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:59:42,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:59:42,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:59:42,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:59:42,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:59:42,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:59:42,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:59:42,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:59:42,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:59:42,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:59:42,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:59:42,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:59:42,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:59:42,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:59:43,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:59:43,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:59:43,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:59:43,009 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:59:43,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:59:43,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42c7a009/5f24366ad590448b98c00c59089617e6/FLAG79513c434 [2020-12-22 09:59:44,349 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:59:44,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:59:44,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42c7a009/5f24366ad590448b98c00c59089617e6/FLAG79513c434 [2020-12-22 09:59:44,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42c7a009/5f24366ad590448b98c00c59089617e6 [2020-12-22 09:59:44,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:59:44,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:59:44,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:59:44,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:59:44,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:59:44,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:59:44" (1/1) ... [2020-12-22 09:59:44,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29588ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:44, skipping insertion in model container [2020-12-22 09:59:44,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:59:44" (1/1) ... [2020-12-22 09:59:44,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:59:44,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:59:45,498 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[11832,11845] [2020-12-22 09:59:45,570 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[18525,18538] [2020-12-22 09:59:46,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:59:46,649 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:59:46,724 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[11832,11845] [2020-12-22 09:59:46,744 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[18525,18538] [2020-12-22 09:59:47,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:59:47,527 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:59:47,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47 WrapperNode [2020-12-22 09:59:47,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:59:47,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:59:47,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:59:47,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:59:47,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (1/1) ... [2020-12-22 09:59:47,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (1/1) ... [2020-12-22 09:59:48,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:59:48,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:59:48,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:59:48,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:59:48,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (1/1) ... [2020-12-22 09:59:48,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (1/1) ... [2020-12-22 09:59:48,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (1/1) ... [2020-12-22 09:59:48,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (1/1) ... [2020-12-22 09:59:48,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (1/1) ... [2020-12-22 09:59:48,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (1/1) ... [2020-12-22 09:59:48,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (1/1) ... [2020-12-22 09:59:48,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:59:48,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:59:48,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:59:48,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:59:48,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:59:48,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:59:48,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:59:48,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:59:48,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:59:54,452 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:59:54,453 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:59:54,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:59:54 BoogieIcfgContainer [2020-12-22 09:59:54,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:59:54,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:59:54,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:59:54,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:59:54,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:59:44" (1/3) ... [2020-12-22 09:59:54,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5572d879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:59:54, skipping insertion in model container [2020-12-22 09:59:54,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:47" (2/3) ... [2020-12-22 09:59:54,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5572d879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:59:54, skipping insertion in model container [2020-12-22 09:59:54,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:59:54" (3/3) ... [2020-12-22 09:59:54,466 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:59:54,474 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:59:54,480 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:59:54,502 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:59:54,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:59:54,540 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:59:54,540 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:59:54,540 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:59:54,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:59:54,540 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:59:54,541 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:59:54,541 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:59:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states. [2020-12-22 09:59:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:59:54,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:54,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:54,589 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:59:54,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:54,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168154458] [2020-12-22 09:59:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:54,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168154458] [2020-12-22 09:59:54,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:54,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:59:54,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216945477] [2020-12-22 09:59:54,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:59:54,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:59:54,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:59:54,924 INFO L87 Difference]: Start difference. First operand 908 states. Second operand 2 states. [2020-12-22 09:59:55,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:55,021 INFO L93 Difference]: Finished difference Result 1777 states and 3370 transitions. [2020-12-22 09:59:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:59:55,022 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:59:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:55,074 INFO L225 Difference]: With dead ends: 1777 [2020-12-22 09:59:55,074 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:59:55,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:59:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:59:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2020-12-22 09:59:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:59:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1588 transitions. [2020-12-22 09:59:55,226 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1588 transitions. Word has length 34 [2020-12-22 09:59:55,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:55,227 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1588 transitions. [2020-12-22 09:59:55,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:59:55,227 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1588 transitions. [2020-12-22 09:59:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:59:55,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:55,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:55,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:59:55,230 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:55,231 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:59:55,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:55,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123906253] [2020-12-22 09:59:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:55,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123906253] [2020-12-22 09:59:55,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:55,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:55,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629571463] [2020-12-22 09:59:55,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:59:55,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:59:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:59:55,357 INFO L87 Difference]: Start difference. First operand 842 states and 1588 transitions. Second operand 5 states. [2020-12-22 09:59:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:55,481 INFO L93 Difference]: Finished difference Result 897 states and 1673 transitions. [2020-12-22 09:59:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:59:55,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:59:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:55,487 INFO L225 Difference]: With dead ends: 897 [2020-12-22 09:59:55,487 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:59:55,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:59:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2020-12-22 09:59:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:59:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1557 transitions. [2020-12-22 09:59:55,515 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1557 transitions. Word has length 34 [2020-12-22 09:59:55,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:55,515 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1557 transitions. [2020-12-22 09:59:55,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:59:55,516 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1557 transitions. [2020-12-22 09:59:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:59:55,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:55,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:55,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:59:55,519 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1064123589, now seen corresponding path program 1 times [2020-12-22 09:59:55,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:55,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131534386] [2020-12-22 09:59:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:55,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131534386] [2020-12-22 09:59:55,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:55,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:59:55,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731583913] [2020-12-22 09:59:55,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:55,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:55,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:55,727 INFO L87 Difference]: Start difference. First operand 842 states and 1557 transitions. Second operand 3 states. [2020-12-22 10:00:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:01,891 INFO L93 Difference]: Finished difference Result 2346 states and 4430 transitions. [2020-12-22 10:00:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:01,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 10:00:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:01,903 INFO L225 Difference]: With dead ends: 2346 [2020-12-22 10:00:01,903 INFO L226 Difference]: Without dead ends: 1593 [2020-12-22 10:00:01,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2020-12-22 10:00:01,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1593. [2020-12-22 10:00:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1593 states. [2020-12-22 10:00:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2536 transitions. [2020-12-22 10:00:01,952 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2536 transitions. Word has length 60 [2020-12-22 10:00:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:01,952 INFO L481 AbstractCegarLoop]: Abstraction has 1593 states and 2536 transitions. [2020-12-22 10:00:01,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2536 transitions. [2020-12-22 10:00:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:01,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:01,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:01,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:00:01,956 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:01,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:01,956 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 10:00:01,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:01,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290321889] [2020-12-22 10:00:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:02,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290321889] [2020-12-22 10:00:02,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:02,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:02,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815942160] [2020-12-22 10:00:02,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:02,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:02,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:02,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:02,071 INFO L87 Difference]: Start difference. First operand 1593 states and 2536 transitions. Second operand 3 states. [2020-12-22 10:00:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:02,158 INFO L93 Difference]: Finished difference Result 1689 states and 2688 transitions. [2020-12-22 10:00:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:02,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 10:00:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:02,168 INFO L225 Difference]: With dead ends: 1689 [2020-12-22 10:00:02,168 INFO L226 Difference]: Without dead ends: 1638 [2020-12-22 10:00:02,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2020-12-22 10:00:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1636. [2020-12-22 10:00:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-12-22 10:00:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2605 transitions. [2020-12-22 10:00:02,212 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2605 transitions. Word has length 64 [2020-12-22 10:00:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:02,213 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 2605 transitions. [2020-12-22 10:00:02,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2605 transitions. [2020-12-22 10:00:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:02,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:02,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:02,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:00:02,216 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 10:00:02,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:02,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426778357] [2020-12-22 10:00:02,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:02,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426778357] [2020-12-22 10:00:02,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:02,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:02,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569807667] [2020-12-22 10:00:02,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:02,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:02,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:02,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:02,341 INFO L87 Difference]: Start difference. First operand 1636 states and 2605 transitions. Second operand 3 states. [2020-12-22 10:00:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:02,386 INFO L93 Difference]: Finished difference Result 1812 states and 2885 transitions. [2020-12-22 10:00:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:02,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 10:00:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:02,396 INFO L225 Difference]: With dead ends: 1812 [2020-12-22 10:00:02,397 INFO L226 Difference]: Without dead ends: 1718 [2020-12-22 10:00:02,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-12-22 10:00:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1716. [2020-12-22 10:00:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2020-12-22 10:00:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2732 transitions. [2020-12-22 10:00:02,446 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2732 transitions. Word has length 64 [2020-12-22 10:00:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:02,446 INFO L481 AbstractCegarLoop]: Abstraction has 1716 states and 2732 transitions. [2020-12-22 10:00:02,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2732 transitions. [2020-12-22 10:00:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:02,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:02,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:02,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:00:02,449 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:02,450 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 10:00:02,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:02,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395936883] [2020-12-22 10:00:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395936883] [2020-12-22 10:00:02,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:02,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:02,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423506426] [2020-12-22 10:00:02,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:02,597 INFO L87 Difference]: Start difference. First operand 1716 states and 2732 transitions. Second operand 3 states. [2020-12-22 10:00:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:02,654 INFO L93 Difference]: Finished difference Result 2040 states and 3246 transitions. [2020-12-22 10:00:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:02,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 10:00:02,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:02,665 INFO L225 Difference]: With dead ends: 2040 [2020-12-22 10:00:02,666 INFO L226 Difference]: Without dead ends: 1866 [2020-12-22 10:00:02,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2020-12-22 10:00:02,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1864. [2020-12-22 10:00:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1864 states. [2020-12-22 10:00:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2964 transitions. [2020-12-22 10:00:02,722 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2964 transitions. Word has length 64 [2020-12-22 10:00:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:02,722 INFO L481 AbstractCegarLoop]: Abstraction has 1864 states and 2964 transitions. [2020-12-22 10:00:02,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2964 transitions. [2020-12-22 10:00:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:02,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:02,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:02,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:00:02,724 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:02,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 10:00:02,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:02,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019787992] [2020-12-22 10:00:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:02,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019787992] [2020-12-22 10:00:02,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:02,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400856335] [2020-12-22 10:00:02,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:02,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:02,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:02,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:02,840 INFO L87 Difference]: Start difference. First operand 1864 states and 2964 transitions. Second operand 3 states. [2020-12-22 10:00:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:02,897 INFO L93 Difference]: Finished difference Result 2460 states and 3902 transitions. [2020-12-22 10:00:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:02,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 10:00:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:02,909 INFO L225 Difference]: With dead ends: 2460 [2020-12-22 10:00:02,909 INFO L226 Difference]: Without dead ends: 2138 [2020-12-22 10:00:02,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2020-12-22 10:00:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 2136. [2020-12-22 10:00:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2136 states. [2020-12-22 10:00:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 3384 transitions. [2020-12-22 10:00:02,978 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 3384 transitions. Word has length 64 [2020-12-22 10:00:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:02,979 INFO L481 AbstractCegarLoop]: Abstraction has 2136 states and 3384 transitions. [2020-12-22 10:00:02,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 3384 transitions. [2020-12-22 10:00:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:02,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:02,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:02,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:00:02,981 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:02,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 10:00:02,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:02,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501455597] [2020-12-22 10:00:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:03,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501455597] [2020-12-22 10:00:03,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:03,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:03,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146379907] [2020-12-22 10:00:03,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:03,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:03,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:03,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:03,093 INFO L87 Difference]: Start difference. First operand 2136 states and 3384 transitions. Second operand 3 states. [2020-12-22 10:00:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:03,184 INFO L93 Difference]: Finished difference Result 3228 states and 5082 transitions. [2020-12-22 10:00:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:03,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 10:00:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:03,199 INFO L225 Difference]: With dead ends: 3228 [2020-12-22 10:00:03,199 INFO L226 Difference]: Without dead ends: 2634 [2020-12-22 10:00:03,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2020-12-22 10:00:03,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2632. [2020-12-22 10:00:03,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2632 states. [2020-12-22 10:00:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 4136 transitions. [2020-12-22 10:00:03,308 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 4136 transitions. Word has length 64 [2020-12-22 10:00:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:03,310 INFO L481 AbstractCegarLoop]: Abstraction has 2632 states and 4136 transitions. [2020-12-22 10:00:03,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 4136 transitions. [2020-12-22 10:00:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:03,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:03,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:03,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:00:03,311 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 10:00:03,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:03,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203342462] [2020-12-22 10:00:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203342462] [2020-12-22 10:00:03,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:03,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:03,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795375922] [2020-12-22 10:00:03,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:03,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:03,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:03,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:03,467 INFO L87 Difference]: Start difference. First operand 2632 states and 4136 transitions. Second operand 7 states. [2020-12-22 10:00:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:04,181 INFO L93 Difference]: Finished difference Result 13532 states and 20946 transitions. [2020-12-22 10:00:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:00:04,181 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 10:00:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:04,270 INFO L225 Difference]: With dead ends: 13532 [2020-12-22 10:00:04,270 INFO L226 Difference]: Without dead ends: 12442 [2020-12-22 10:00:04,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:00:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12442 states. [2020-12-22 10:00:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12442 to 3720. [2020-12-22 10:00:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-12-22 10:00:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5752 transitions. [2020-12-22 10:00:04,615 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5752 transitions. Word has length 64 [2020-12-22 10:00:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:04,616 INFO L481 AbstractCegarLoop]: Abstraction has 3720 states and 5752 transitions. [2020-12-22 10:00:04,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5752 transitions. [2020-12-22 10:00:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 10:00:04,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:04,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:04,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:00:04,625 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 10:00:04,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:04,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249388621] [2020-12-22 10:00:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:04,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249388621] [2020-12-22 10:00:04,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:04,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:04,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930598993] [2020-12-22 10:00:04,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:04,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:04,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:04,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:04,719 INFO L87 Difference]: Start difference. First operand 3720 states and 5752 transitions. Second operand 3 states. [2020-12-22 10:00:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:04,934 INFO L93 Difference]: Finished difference Result 6910 states and 10572 transitions. [2020-12-22 10:00:04,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:04,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 10:00:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:04,952 INFO L225 Difference]: With dead ends: 6910 [2020-12-22 10:00:04,952 INFO L226 Difference]: Without dead ends: 4732 [2020-12-22 10:00:04,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2020-12-22 10:00:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4730. [2020-12-22 10:00:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 10:00:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7226 transitions. [2020-12-22 10:00:05,290 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7226 transitions. Word has length 66 [2020-12-22 10:00:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:05,291 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7226 transitions. [2020-12-22 10:00:05,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7226 transitions. [2020-12-22 10:00:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 10:00:05,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:05,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:05,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:00:05,292 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 10:00:05,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:05,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114953390] [2020-12-22 10:00:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:05,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114953390] [2020-12-22 10:00:05,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:05,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:05,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376381446] [2020-12-22 10:00:05,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:05,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:05,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:05,483 INFO L87 Difference]: Start difference. First operand 4730 states and 7226 transitions. Second operand 7 states. [2020-12-22 10:00:05,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:05,913 INFO L93 Difference]: Finished difference Result 7918 states and 11996 transitions. [2020-12-22 10:00:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:05,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 10:00:05,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:05,925 INFO L225 Difference]: With dead ends: 7918 [2020-12-22 10:00:05,925 INFO L226 Difference]: Without dead ends: 4732 [2020-12-22 10:00:05,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:00:05,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2020-12-22 10:00:06,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4730. [2020-12-22 10:00:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 10:00:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7178 transitions. [2020-12-22 10:00:06,184 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7178 transitions. Word has length 66 [2020-12-22 10:00:06,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:06,185 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7178 transitions. [2020-12-22 10:00:06,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:06,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7178 transitions. [2020-12-22 10:00:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:00:06,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:06,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:06,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:00:06,187 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:06,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:06,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 10:00:06,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:06,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136150277] [2020-12-22 10:00:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:06,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136150277] [2020-12-22 10:00:06,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:06,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:06,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583389293] [2020-12-22 10:00:06,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:06,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:06,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:06,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:06,287 INFO L87 Difference]: Start difference. First operand 4730 states and 7178 transitions. Second operand 6 states. [2020-12-22 10:00:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:06,651 INFO L93 Difference]: Finished difference Result 7916 states and 11899 transitions. [2020-12-22 10:00:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:06,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 10:00:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:06,667 INFO L225 Difference]: With dead ends: 7916 [2020-12-22 10:00:06,667 INFO L226 Difference]: Without dead ends: 4730 [2020-12-22 10:00:06,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:00:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2020-12-22 10:00:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 4730. [2020-12-22 10:00:06,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 10:00:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7130 transitions. [2020-12-22 10:00:06,956 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7130 transitions. Word has length 67 [2020-12-22 10:00:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:06,957 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7130 transitions. [2020-12-22 10:00:06,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7130 transitions. [2020-12-22 10:00:06,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:00:06,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:06,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:06,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:00:06,959 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:06,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:06,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 10:00:06,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:06,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520712437] [2020-12-22 10:00:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:07,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520712437] [2020-12-22 10:00:07,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:07,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:07,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81168663] [2020-12-22 10:00:07,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:07,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:07,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:07,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:07,048 INFO L87 Difference]: Start difference. First operand 4730 states and 7130 transitions. Second operand 6 states. [2020-12-22 10:00:07,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:07,472 INFO L93 Difference]: Finished difference Result 7916 states and 11803 transitions. [2020-12-22 10:00:07,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:07,473 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 10:00:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:07,484 INFO L225 Difference]: With dead ends: 7916 [2020-12-22 10:00:07,485 INFO L226 Difference]: Without dead ends: 4730 [2020-12-22 10:00:07,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:00:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2020-12-22 10:00:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 4730. [2020-12-22 10:00:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 10:00:07,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7082 transitions. [2020-12-22 10:00:07,738 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7082 transitions. Word has length 67 [2020-12-22 10:00:07,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:07,738 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7082 transitions. [2020-12-22 10:00:07,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:07,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7082 transitions. [2020-12-22 10:00:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:00:07,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:07,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:07,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:00:07,740 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:07,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:07,740 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 10:00:07,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:07,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521971008] [2020-12-22 10:00:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:07,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521971008] [2020-12-22 10:00:07,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:07,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:07,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851459273] [2020-12-22 10:00:07,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:00:07,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:07,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:00:07,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:00:07,823 INFO L87 Difference]: Start difference. First operand 4730 states and 7082 transitions. Second operand 5 states. [2020-12-22 10:00:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:08,300 INFO L93 Difference]: Finished difference Result 7509 states and 10992 transitions. [2020-12-22 10:00:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:08,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 10:00:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:08,318 INFO L225 Difference]: With dead ends: 7509 [2020-12-22 10:00:08,319 INFO L226 Difference]: Without dead ends: 7507 [2020-12-22 10:00:08,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7507 states. [2020-12-22 10:00:08,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7507 to 4922. [2020-12-22 10:00:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4922 states. [2020-12-22 10:00:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 7258 transitions. [2020-12-22 10:00:08,689 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 7258 transitions. Word has length 67 [2020-12-22 10:00:08,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:08,690 INFO L481 AbstractCegarLoop]: Abstraction has 4922 states and 7258 transitions. [2020-12-22 10:00:08,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:00:08,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 7258 transitions. [2020-12-22 10:00:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:08,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:08,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:08,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:00:08,695 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:08,696 INFO L82 PathProgramCache]: Analyzing trace with hash -119875554, now seen corresponding path program 1 times [2020-12-22 10:00:08,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:08,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273708137] [2020-12-22 10:00:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:00:08,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273708137] [2020-12-22 10:00:08,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:08,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:08,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303432246] [2020-12-22 10:00:08,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:08,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:08,817 INFO L87 Difference]: Start difference. First operand 4922 states and 7258 transitions. Second operand 7 states. [2020-12-22 10:00:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:10,449 INFO L93 Difference]: Finished difference Result 22502 states and 32192 transitions. [2020-12-22 10:00:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:10,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:10,497 INFO L225 Difference]: With dead ends: 22502 [2020-12-22 10:00:10,497 INFO L226 Difference]: Without dead ends: 19124 [2020-12-22 10:00:10,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:10,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19124 states. [2020-12-22 10:00:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19124 to 8298. [2020-12-22 10:00:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8298 states. [2020-12-22 10:00:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8298 states to 8298 states and 12010 transitions. [2020-12-22 10:00:11,308 INFO L78 Accepts]: Start accepts. Automaton has 8298 states and 12010 transitions. Word has length 94 [2020-12-22 10:00:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:11,309 INFO L481 AbstractCegarLoop]: Abstraction has 8298 states and 12010 transitions. [2020-12-22 10:00:11,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 8298 states and 12010 transitions. [2020-12-22 10:00:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:11,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:11,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:11,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:00:11,315 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:11,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1888658370, now seen corresponding path program 1 times [2020-12-22 10:00:11,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:11,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496537415] [2020-12-22 10:00:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:00:11,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496537415] [2020-12-22 10:00:11,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:11,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:11,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407878071] [2020-12-22 10:00:11,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:11,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:11,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:11,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:11,443 INFO L87 Difference]: Start difference. First operand 8298 states and 12010 transitions. Second operand 7 states. [2020-12-22 10:00:13,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:13,101 INFO L93 Difference]: Finished difference Result 25878 states and 36944 transitions. [2020-12-22 10:00:13,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:13,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:13,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:13,148 INFO L225 Difference]: With dead ends: 25878 [2020-12-22 10:00:13,148 INFO L226 Difference]: Without dead ends: 22500 [2020-12-22 10:00:13,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22500 states. [2020-12-22 10:00:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22500 to 13370. [2020-12-22 10:00:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13370 states. [2020-12-22 10:00:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13370 states to 13370 states and 19098 transitions. [2020-12-22 10:00:14,007 INFO L78 Accepts]: Start accepts. Automaton has 13370 states and 19098 transitions. Word has length 94 [2020-12-22 10:00:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:14,007 INFO L481 AbstractCegarLoop]: Abstraction has 13370 states and 19098 transitions. [2020-12-22 10:00:14,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 13370 states and 19098 transitions. [2020-12-22 10:00:14,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:14,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:14,013 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:14,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:00:14,013 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash -757018530, now seen corresponding path program 1 times [2020-12-22 10:00:14,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:14,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270688947] [2020-12-22 10:00:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:00:14,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270688947] [2020-12-22 10:00:14,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:14,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:14,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918735505] [2020-12-22 10:00:14,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:14,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:14,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:14,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:14,141 INFO L87 Difference]: Start difference. First operand 13370 states and 19098 transitions. Second operand 7 states. [2020-12-22 10:00:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:16,208 INFO L93 Difference]: Finished difference Result 29254 states and 41696 transitions. [2020-12-22 10:00:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:16,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:16,267 INFO L225 Difference]: With dead ends: 29254 [2020-12-22 10:00:16,268 INFO L226 Difference]: Without dead ends: 25876 [2020-12-22 10:00:16,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25876 states. [2020-12-22 10:00:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25876 to 16746. [2020-12-22 10:00:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16746 states. [2020-12-22 10:00:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16746 states to 16746 states and 23850 transitions. [2020-12-22 10:00:17,476 INFO L78 Accepts]: Start accepts. Automaton has 16746 states and 23850 transitions. Word has length 94 [2020-12-22 10:00:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:17,476 INFO L481 AbstractCegarLoop]: Abstraction has 16746 states and 23850 transitions. [2020-12-22 10:00:17,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 16746 states and 23850 transitions. [2020-12-22 10:00:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:17,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:17,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:17,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:00:17,482 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:17,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1992477570, now seen corresponding path program 1 times [2020-12-22 10:00:17,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:17,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115298980] [2020-12-22 10:00:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:00:17,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115298980] [2020-12-22 10:00:17,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:17,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:17,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061902384] [2020-12-22 10:00:17,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:17,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:17,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:17,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:17,604 INFO L87 Difference]: Start difference. First operand 16746 states and 23850 transitions. Second operand 7 states. [2020-12-22 10:00:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:19,224 INFO L93 Difference]: Finished difference Result 32630 states and 46448 transitions. [2020-12-22 10:00:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:19,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:19,288 INFO L225 Difference]: With dead ends: 32630 [2020-12-22 10:00:19,288 INFO L226 Difference]: Without dead ends: 29252 [2020-12-22 10:00:19,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29252 states. [2020-12-22 10:00:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29252 to 20122. [2020-12-22 10:00:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20122 states. [2020-12-22 10:00:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20122 states to 20122 states and 28602 transitions. [2020-12-22 10:00:20,756 INFO L78 Accepts]: Start accepts. Automaton has 20122 states and 28602 transitions. Word has length 94 [2020-12-22 10:00:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:20,756 INFO L481 AbstractCegarLoop]: Abstraction has 20122 states and 28602 transitions. [2020-12-22 10:00:20,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 20122 states and 28602 transitions. [2020-12-22 10:00:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:20,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:20,764 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:20,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:00:20,764 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:20,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash 881494174, now seen corresponding path program 1 times [2020-12-22 10:00:20,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:20,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332428576] [2020-12-22 10:00:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:00:20,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332428576] [2020-12-22 10:00:20,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:20,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:20,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113994556] [2020-12-22 10:00:20,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:20,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:20,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:20,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:20,878 INFO L87 Difference]: Start difference. First operand 20122 states and 28602 transitions. Second operand 7 states. [2020-12-22 10:00:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:22,810 INFO L93 Difference]: Finished difference Result 33990 states and 48384 transitions. [2020-12-22 10:00:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:22,811 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:22,859 INFO L225 Difference]: With dead ends: 33990 [2020-12-22 10:00:22,859 INFO L226 Difference]: Without dead ends: 31620 [2020-12-22 10:00:22,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31620 states. [2020-12-22 10:00:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31620 to 22490. [2020-12-22 10:00:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22490 states. [2020-12-22 10:00:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22490 states to 22490 states and 31962 transitions. [2020-12-22 10:00:24,496 INFO L78 Accepts]: Start accepts. Automaton has 22490 states and 31962 transitions. Word has length 94 [2020-12-22 10:00:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:24,496 INFO L481 AbstractCegarLoop]: Abstraction has 22490 states and 31962 transitions. [2020-12-22 10:00:24,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 22490 states and 31962 transitions. [2020-12-22 10:00:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:00:24,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:24,504 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:24,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:00:24,505 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2121264847, now seen corresponding path program 1 times [2020-12-22 10:00:24,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:24,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021241582] [2020-12-22 10:00:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:24,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021241582] [2020-12-22 10:00:24,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49987906] [2020-12-22 10:00:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:00:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:00:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:00:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:00:25,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:00:25,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 10:00:25,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785368172] [2020-12-22 10:00:25,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:00:25,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:25,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:00:25,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:00:25,505 INFO L87 Difference]: Start difference. First operand 22490 states and 31962 transitions. Second operand 16 states. [2020-12-22 10:00:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:39,872 INFO L93 Difference]: Finished difference Result 135089 states and 188761 transitions. [2020-12-22 10:00:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 10:00:39,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2020-12-22 10:00:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:40,115 INFO L225 Difference]: With dead ends: 135089 [2020-12-22 10:00:40,116 INFO L226 Difference]: Without dead ends: 114143 [2020-12-22 10:00:40,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1223, Invalid=5419, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 10:00:40,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114143 states. [2020-12-22 10:00:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114143 to 71746. [2020-12-22 10:00:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71746 states. [2020-12-22 10:00:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71746 states to 71746 states and 99946 transitions. [2020-12-22 10:00:46,992 INFO L78 Accepts]: Start accepts. Automaton has 71746 states and 99946 transitions. Word has length 95 [2020-12-22 10:00:46,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:46,992 INFO L481 AbstractCegarLoop]: Abstraction has 71746 states and 99946 transitions. [2020-12-22 10:00:46,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:00:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 71746 states and 99946 transitions. [2020-12-22 10:00:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 10:00:47,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:47,002 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:47,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:00:47,217 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:47,218 INFO L82 PathProgramCache]: Analyzing trace with hash 421270486, now seen corresponding path program 1 times [2020-12-22 10:00:47,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:47,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668771692] [2020-12-22 10:00:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:47,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668771692] [2020-12-22 10:00:47,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572510349] [2020-12-22 10:00:47,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:00:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:47,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:00:47,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:00:47,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:00:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:48,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:00:48,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-12-22 10:00:48,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583484630] [2020-12-22 10:00:48,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:00:48,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:00:48,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:00:48,213 INFO L87 Difference]: Start difference. First operand 71746 states and 99946 transitions. Second operand 21 states. [2020-12-22 10:00:48,710 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:00:49,506 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:49,700 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:00:50,147 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 10:00:50,994 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-22 10:00:54,982 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-22 10:00:59,999 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:01:00,426 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:01:00,639 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:01:01,027 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:01:01,296 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 10:01:01,503 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:01:01,787 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:01:02,005 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:01:02,209 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:01:02,626 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:01:03,132 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:01:03,576 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:01:04,261 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 10:01:04,453 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-22 10:01:04,905 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:01:05,362 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:01:05,892 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 10:01:06,105 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:01:06,400 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:01:06,657 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 10:01:06,899 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:01:07,117 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:01:07,392 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 10:01:08,465 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 10:01:08,682 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:01:09,058 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:01:09,454 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:01:14,626 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-22 10:02:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:30,678 INFO L93 Difference]: Finished difference Result 974253 states and 1327479 transitions. [2020-12-22 10:02:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2020-12-22 10:02:30,679 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 10:02:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:32,722 INFO L225 Difference]: With dead ends: 974253 [2020-12-22 10:02:32,722 INFO L226 Difference]: Without dead ends: 904051 [2020-12-22 10:02:33,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45792 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=10942, Invalid=93710, Unknown=0, NotChecked=0, Total=104652 [2020-12-22 10:02:33,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904051 states. [2020-12-22 10:03:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904051 to 346462. [2020-12-22 10:03:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346462 states. [2020-12-22 10:03:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346462 states to 346462 states and 476866 transitions. [2020-12-22 10:03:11,748 INFO L78 Accepts]: Start accepts. Automaton has 346462 states and 476866 transitions. Word has length 96 [2020-12-22 10:03:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:11,749 INFO L481 AbstractCegarLoop]: Abstraction has 346462 states and 476866 transitions. [2020-12-22 10:03:11,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:03:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 346462 states and 476866 transitions. [2020-12-22 10:03:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 10:03:11,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:11,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:11,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:03:11,976 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:11,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:11,978 INFO L82 PathProgramCache]: Analyzing trace with hash 496443166, now seen corresponding path program 1 times [2020-12-22 10:03:11,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:11,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631607607] [2020-12-22 10:03:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:12,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631607607] [2020-12-22 10:03:12,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:12,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:12,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225531230] [2020-12-22 10:03:12,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:12,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:12,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:12,084 INFO L87 Difference]: Start difference. First operand 346462 states and 476866 transitions. Second operand 3 states.